Can read Dutch (and know a bit or two about employment law): €3 million total in 8 wrongful termination suits is quite high for Dutch standards. Normal termination would have cost Ryanair about €400.000, the other €2.6M is compensation for unfair behaviour on Ryanair's side. (The judge had some choice words about the way RYR handled the EHEH strike and "negotiations" with the union.)
And no, this verdict is based on Dutch employment law, which is sufficiently different from the law in other countries that it does not set an EU precedent.